From 6bd5ab92bd0b407db7ba74d41bf49d900aa887cf Mon Sep 17 00:00:00 2001 From: aerooneqq Date: Thu, 14 May 2026 10:53:17 +0300 Subject: [PATCH] Emit error when self type is not specified and accessed --- compiler/rustc_hir_analysis/src/delegation.rs | 7 ++ compiler/rustc_hir_analysis/src/errors.rs | 8 +++ .../generics/free-to-trait-static-reuse.rs | 6 ++ .../free-to-trait-static-reuse.stderr | 70 ++++++++++++++----- tests/ui/delegation/self-ty-ice-156388.rs | 8 +++ tests/ui/delegation/self-ty-ice-156388.stderr | 10 +++ tests/ui/delegation/target-expr.rs | 3 + tests/ui/delegation/target-expr.stderr | 25 ++++--- .../ui/delegation/unsupported.current.stderr | 34 +++++---- tests/ui/delegation/unsupported.next.stderr | 34 +++++---- tests/ui/delegation/unsupported.rs | 2 + 11 files changed, 154 insertions(+), 53 deletions(-) create mode 100644 tests/ui/delegation/self-ty-ice-156388.rs create mode 100644 tests/ui/delegation/self-ty-ice-156388.stderr diff --git a/compiler/rustc_hir_analysis/src/delegation.rs b/compiler/rustc_hir_analysis/src/delegation.rs index be8a8e228c47a..2d6d5a5d81f9a 100644 --- a/compiler/rustc_hir_analysis/src/delegation.rs +++ b/compiler/rustc_hir_analysis/src/delegation.rs @@ -14,6 +14,7 @@ use rustc_middle::ty::{ use rustc_span::{ErrorGuaranteed, Span, kw}; use crate::collect::ItemCtxt; +use crate::errors::DelegationSelfTypeNotSpecified; use crate::hir_ty_lowering::HirTyLowerer; type RemapTable = FxHashMap; @@ -284,6 +285,12 @@ fn get_delegation_self_ty_or_err(tcx: TyCtxt<'_>, delegation_id: LocalDefId) -> ctx.lower_ty(tcx.hir_node(id).expect_ty()) }) .unwrap_or_else(|| { + // It is possible to attempt to get self type when it is used in signature + // (i.e., `fn default() -> Self`), so emit error here in addition to possible + // `mismatched types` error (see #156388). + let err = DelegationSelfTypeNotSpecified { span: tcx.def_span(delegation_id) }; + tcx.dcx().emit_err(err); + Ty::new_error_with_message( tcx, tcx.def_span(delegation_id), diff --git a/compiler/rustc_hir_analysis/src/errors.rs b/compiler/rustc_hir_analysis/src/errors.rs index 9fc26a3b80744..20019aeff3eb8 100644 --- a/compiler/rustc_hir_analysis/src/errors.rs +++ b/compiler/rustc_hir_analysis/src/errors.rs @@ -1670,6 +1670,14 @@ pub(crate) struct UnsupportedDelegation<'a> { pub callee_span: Span, } +#[derive(Diagnostic)] +#[diag("delegation self type is not specified")] +#[help("consider explicitly specifying self type: `reuse ::function`")] +pub(crate) struct DelegationSelfTypeNotSpecified { + #[primary_span] + pub span: Span, +} + #[derive(Diagnostic)] #[diag("method should be `async` or return a future, but it is synchronous")] pub(crate) struct MethodShouldReturnFuture { diff --git a/tests/ui/delegation/generics/free-to-trait-static-reuse.rs b/tests/ui/delegation/generics/free-to-trait-static-reuse.rs index abb69e5fc1588..e3d0bdbc7e9b0 100644 --- a/tests/ui/delegation/generics/free-to-trait-static-reuse.rs +++ b/tests/ui/delegation/generics/free-to-trait-static-reuse.rs @@ -1,3 +1,5 @@ +//@ compile-flags: -Z deduplicate-diagnostics=yes + #![feature(fn_delegation)] trait Bound {} @@ -19,12 +21,16 @@ reuse ::static_method::<'static, Vec, false> as bar2; reuse Trait::static_method as error { self - 123 } //~^ ERROR: type annotations needed +//~| ERROR: delegation self type is not specified reuse Trait::<'static, i32, 123>::static_method as error2; //~^ ERROR: type annotations needed +//~| ERROR: delegation self type is not specified reuse Trait::<'static, i32, 123>::static_method::<'static, String, false> as error3; //~^ ERROR: type annotations needed +//~| ERROR: delegation self type is not specified reuse Trait::static_method::<'static, Vec, false> as error4 { self + 4 } //~^ ERROR: type annotations needed +//~| ERROR: delegation self type is not specified reuse ::static_method as error5; //~^ ERROR: the trait bound `String: Trait<'a, T, X>` is not satisfied diff --git a/tests/ui/delegation/generics/free-to-trait-static-reuse.stderr b/tests/ui/delegation/generics/free-to-trait-static-reuse.stderr index 398fa2e5db92a..8d87b9376acd4 100644 --- a/tests/ui/delegation/generics/free-to-trait-static-reuse.stderr +++ b/tests/ui/delegation/generics/free-to-trait-static-reuse.stderr @@ -1,21 +1,53 @@ +error: delegation self type is not specified + --> $DIR/free-to-trait-static-reuse.rs:22:14 + | +LL | reuse Trait::static_method as error { self - 123 } + | ^^^^^^^^^^^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + +error: delegation self type is not specified + --> $DIR/free-to-trait-static-reuse.rs:25:35 + | +LL | reuse Trait::<'static, i32, 123>::static_method as error2; + | ^^^^^^^^^^^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + +error: delegation self type is not specified + --> $DIR/free-to-trait-static-reuse.rs:28:35 + | +LL | reuse Trait::<'static, i32, 123>::static_method::<'static, String, false> as error3; + | ^^^^^^^^^^^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + +error: delegation self type is not specified + --> $DIR/free-to-trait-static-reuse.rs:31:14 + | +LL | reuse Trait::static_method::<'static, Vec, false> as error4 { self + 4 } + | ^^^^^^^^^^^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + error[E0277]: the trait bound `Struct: Bound` is not satisfied - --> $DIR/free-to-trait-static-reuse.rs:33:49 + --> $DIR/free-to-trait-static-reuse.rs:39:49 | LL | impl<'a, T, const X: usize> Trait<'a, T, X> for Struct {} | ^^^^^^ unsatisfied trait bound | help: the trait `Bound` is not implemented for `Struct` - --> $DIR/free-to-trait-static-reuse.rs:32:1 + --> $DIR/free-to-trait-static-reuse.rs:38:1 | LL | struct Struct; | ^^^^^^^^^^^^^ help: the trait `Bound` is implemented for `usize` - --> $DIR/free-to-trait-static-reuse.rs:13:1 + --> $DIR/free-to-trait-static-reuse.rs:15:1 | LL | impl Bound for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ note: required by a bound in `Trait` - --> $DIR/free-to-trait-static-reuse.rs:7:11 + --> $DIR/free-to-trait-static-reuse.rs:9:11 | LL | trait Trait<'a, T, const X: usize> | ----- required by a bound in this trait @@ -24,13 +56,13 @@ LL | Self: Bound, | ^^^^^^^^ required by this bound in `Trait` error[E0283]: type annotations needed - --> $DIR/free-to-trait-static-reuse.rs:20:14 + --> $DIR/free-to-trait-static-reuse.rs:22:14 | LL | reuse Trait::static_method as error { self - 123 } | ^^^^^^^^^^^^^ cannot infer type | note: multiple `impl`s satisfying `_: Trait<'a, T, X>` found - --> $DIR/free-to-trait-static-reuse.rs:12:1 + --> $DIR/free-to-trait-static-reuse.rs:14:1 | LL | impl<'a, T, const X: usize> Trait<'a, T, X> for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -39,13 +71,13 @@ LL | impl<'a, T, const X: usize> Trait<'a, T, X> for Struct {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0283]: type annotations needed - --> $DIR/free-to-trait-static-reuse.rs:22:35 + --> $DIR/free-to-trait-static-reuse.rs:25:35 | LL | reuse Trait::<'static, i32, 123>::static_method as error2; | ^^^^^^^^^^^^^ cannot infer type | note: multiple `impl`s satisfying `_: Trait<'static, i32, 123>` found - --> $DIR/free-to-trait-static-reuse.rs:12:1 + --> $DIR/free-to-trait-static-reuse.rs:14:1 | LL | impl<'a, T, const X: usize> Trait<'a, T, X> for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -54,13 +86,13 @@ LL | impl<'a, T, const X: usize> Trait<'a, T, X> for Struct {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0283]: type annotations needed - --> $DIR/free-to-trait-static-reuse.rs:24:35 + --> $DIR/free-to-trait-static-reuse.rs:28:35 | LL | reuse Trait::<'static, i32, 123>::static_method::<'static, String, false> as error3; | ^^^^^^^^^^^^^ cannot infer type | note: multiple `impl`s satisfying `_: Trait<'static, i32, 123>` found - --> $DIR/free-to-trait-static-reuse.rs:12:1 + --> $DIR/free-to-trait-static-reuse.rs:14:1 | LL | impl<'a, T, const X: usize> Trait<'a, T, X> for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -69,13 +101,13 @@ LL | impl<'a, T, const X: usize> Trait<'a, T, X> for Struct {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0283]: type annotations needed - --> $DIR/free-to-trait-static-reuse.rs:26:14 + --> $DIR/free-to-trait-static-reuse.rs:31:14 | LL | reuse Trait::static_method::<'static, Vec, false> as error4 { self + 4 } | ^^^^^^^^^^^^^ cannot infer type | note: multiple `impl`s satisfying `_: Trait<'a, T, X>` found - --> $DIR/free-to-trait-static-reuse.rs:12:1 + --> $DIR/free-to-trait-static-reuse.rs:14:1 | LL | impl<'a, T, const X: usize> Trait<'a, T, X> for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -84,13 +116,13 @@ LL | impl<'a, T, const X: usize> Trait<'a, T, X> for Struct {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0277]: the trait bound `String: Trait<'a, T, X>` is not satisfied - --> $DIR/free-to-trait-static-reuse.rs:29:8 + --> $DIR/free-to-trait-static-reuse.rs:35:8 | LL | reuse ::static_method as error5; | ^^^^^^ the trait `Trait<'a, T, X>` is not implemented for `String` | help: the following other types implement trait `Trait<'a, T, X>` - --> $DIR/free-to-trait-static-reuse.rs:12:1 + --> $DIR/free-to-trait-static-reuse.rs:14:1 | LL | impl<'a, T, const X: usize> Trait<'a, T, X> for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `usize` @@ -99,23 +131,23 @@ LL | impl<'a, T, const X: usize> Trait<'a, T, X> for Struct {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `Struct` error[E0277]: the trait bound `Struct: Bound` is not satisfied - --> $DIR/free-to-trait-static-reuse.rs:36:8 + --> $DIR/free-to-trait-static-reuse.rs:42:8 | LL | reuse ::static_method as error6; | ^^^^^^ unsatisfied trait bound | help: the trait `Bound` is not implemented for `Struct` - --> $DIR/free-to-trait-static-reuse.rs:32:1 + --> $DIR/free-to-trait-static-reuse.rs:38:1 | LL | struct Struct; | ^^^^^^^^^^^^^ help: the trait `Bound` is implemented for `usize` - --> $DIR/free-to-trait-static-reuse.rs:13:1 + --> $DIR/free-to-trait-static-reuse.rs:15:1 | LL | impl Bound for usize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^ note: required by a bound in `Trait::static_method` - --> $DIR/free-to-trait-static-reuse.rs:7:11 + --> $DIR/free-to-trait-static-reuse.rs:9:11 | LL | Self: Bound, | ^^^^^^^^ required by this bound in `Trait::static_method` @@ -123,7 +155,7 @@ LL | { LL | fn static_method<'c: 'c, U, const B: bool>(x: usize) {} | ------------- required by a bound in this associated function -error: aborting due to 7 previous errors +error: aborting due to 11 previous errors Some errors have detailed explanations: E0277, E0283. For more information about an error, try `rustc --explain E0277`. diff --git a/tests/ui/delegation/self-ty-ice-156388.rs b/tests/ui/delegation/self-ty-ice-156388.rs new file mode 100644 index 0000000000000..542f56867b2b2 --- /dev/null +++ b/tests/ui/delegation/self-ty-ice-156388.rs @@ -0,0 +1,8 @@ +//@ compile-flags: -Z deduplicate-diagnostics=yes + +#![feature(fn_delegation)] + +reuse Default::default; +//~^ ERROR: delegation self type is not specified + +fn main() {} diff --git a/tests/ui/delegation/self-ty-ice-156388.stderr b/tests/ui/delegation/self-ty-ice-156388.stderr new file mode 100644 index 0000000000000..c2323cf1c6082 --- /dev/null +++ b/tests/ui/delegation/self-ty-ice-156388.stderr @@ -0,0 +1,10 @@ +error: delegation self type is not specified + --> $DIR/self-ty-ice-156388.rs:5:16 + | +LL | reuse Default::default; + | ^^^^^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + +error: aborting due to 1 previous error + diff --git a/tests/ui/delegation/target-expr.rs b/tests/ui/delegation/target-expr.rs index 253ce1fffff72..2355decd3d4f7 100644 --- a/tests/ui/delegation/target-expr.rs +++ b/tests/ui/delegation/target-expr.rs @@ -1,3 +1,5 @@ +//@ compile-flags: -Z deduplicate-diagnostics=yes + #![feature(fn_delegation)] trait Trait { @@ -14,6 +16,7 @@ fn foo(x: i32) -> i32 { x } fn bar(_: T) { reuse Trait::static_method { //~^ ERROR mismatched types + //~| ERROR: delegation self type is not specified let _ = T::Default(); //~^ ERROR can't use generic parameters from outer item } diff --git a/tests/ui/delegation/target-expr.stderr b/tests/ui/delegation/target-expr.stderr index 7153fa4178374..8965a1a060786 100644 --- a/tests/ui/delegation/target-expr.stderr +++ b/tests/ui/delegation/target-expr.stderr @@ -1,18 +1,18 @@ error[E0401]: can't use generic parameters from outer item - --> $DIR/target-expr.rs:17:17 + --> $DIR/target-expr.rs:20:17 | LL | fn bar(_: T) { | - type parameter from outer item LL | reuse Trait::static_method { | ------------- generic parameter used in this inner delegated function -LL | +... LL | let _ = T::Default(); | ^ use of generic parameter from outer item | = note: nested items are independent from their parent item for everything except for privacy and name resolution error[E0434]: can't capture dynamic environment in a fn item - --> $DIR/target-expr.rs:25:17 + --> $DIR/target-expr.rs:28:17 | LL | let x = y; | ^ @@ -20,7 +20,7 @@ LL | let x = y; = help: use the `|| { ... }` closure form instead error[E0424]: expected value, found module `self` - --> $DIR/target-expr.rs:32:5 + --> $DIR/target-expr.rs:35:5 | LL | fn main() { | ---- this function can't have a `self` parameter @@ -29,29 +29,38 @@ LL | self.0; | ^^^^ `self` value is a keyword only available in methods with a `self` parameter error[E0425]: cannot find value `x` in this scope - --> $DIR/target-expr.rs:34:13 + --> $DIR/target-expr.rs:37:13 | LL | let z = x; | ^ | help: the binding `x` is available in a different scope in the same function - --> $DIR/target-expr.rs:25:13 + --> $DIR/target-expr.rs:28:13 | LL | let x = y; | ^ +error: delegation self type is not specified + --> $DIR/target-expr.rs:17:18 + | +LL | reuse Trait::static_method { + | ^^^^^^^^^^^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + error[E0308]: mismatched types - --> $DIR/target-expr.rs:15:32 + --> $DIR/target-expr.rs:17:32 | LL | reuse Trait::static_method { | ________________________________^ LL | | +LL | | LL | | let _ = T::Default(); LL | | LL | | } | |_____^ expected `i32`, found `()` -error: aborting due to 5 previous errors +error: aborting due to 6 previous errors Some errors have detailed explanations: E0308, E0401, E0424, E0425, E0434. For more information about an error, try `rustc --explain E0308`. diff --git a/tests/ui/delegation/unsupported.current.stderr b/tests/ui/delegation/unsupported.current.stderr index 21ea451a2ea5c..88938cd8b362c 100644 --- a/tests/ui/delegation/unsupported.current.stderr +++ b/tests/ui/delegation/unsupported.current.stderr @@ -1,41 +1,49 @@ -error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` - --> $DIR/unsupported.rs:29:25 +error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` + --> $DIR/unsupported.rs:30:25 | LL | reuse to_reuse::opaque_ret; | ^^^^^^^^^^ | note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process... - --> $DIR/unsupported.rs:29:25 + --> $DIR/unsupported.rs:30:25 | LL | reuse to_reuse::opaque_ret; | ^^^^^^^^^^ - = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle -note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition - --> $DIR/unsupported.rs:29:25 + = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle +note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition + --> $DIR/unsupported.rs:30:25 | LL | reuse to_reuse::opaque_ret; | ^^^^^^^^^^ = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information -error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` - --> $DIR/unsupported.rs:32:24 +error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` + --> $DIR/unsupported.rs:33:24 | LL | reuse ToReuse::opaque_ret; | ^^^^^^^^^^ | note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process... - --> $DIR/unsupported.rs:32:24 + --> $DIR/unsupported.rs:33:24 | LL | reuse ToReuse::opaque_ret; | ^^^^^^^^^^ - = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle -note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition - --> $DIR/unsupported.rs:32:24 + = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle +note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition + --> $DIR/unsupported.rs:33:24 | LL | reuse ToReuse::opaque_ret; | ^^^^^^^^^^ = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information -error: aborting due to 2 previous errors +error: delegation self type is not specified + --> $DIR/unsupported.rs:54:18 + | +LL | reuse Trait::foo; + | ^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + +error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0391`. diff --git a/tests/ui/delegation/unsupported.next.stderr b/tests/ui/delegation/unsupported.next.stderr index 21ea451a2ea5c..88938cd8b362c 100644 --- a/tests/ui/delegation/unsupported.next.stderr +++ b/tests/ui/delegation/unsupported.next.stderr @@ -1,41 +1,49 @@ -error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` - --> $DIR/unsupported.rs:29:25 +error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` + --> $DIR/unsupported.rs:30:25 | LL | reuse to_reuse::opaque_ret; | ^^^^^^^^^^ | note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process... - --> $DIR/unsupported.rs:29:25 + --> $DIR/unsupported.rs:30:25 | LL | reuse to_reuse::opaque_ret; | ^^^^^^^^^^ - = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle -note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition - --> $DIR/unsupported.rs:29:25 + = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle +note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition + --> $DIR/unsupported.rs:30:25 | LL | reuse to_reuse::opaque_ret; | ^^^^^^^^^^ = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information -error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` - --> $DIR/unsupported.rs:32:24 +error[E0391]: cycle detected when computing type of `opaque::::opaque_ret::{anon_assoc#0}` + --> $DIR/unsupported.rs:33:24 | LL | reuse ToReuse::opaque_ret; | ^^^^^^^^^^ | note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process... - --> $DIR/unsupported.rs:32:24 + --> $DIR/unsupported.rs:33:24 | LL | reuse ToReuse::opaque_ret; | ^^^^^^^^^^ - = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle -note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition - --> $DIR/unsupported.rs:32:24 + = note: ...which again requires computing type of `opaque::::opaque_ret::{anon_assoc#0}`, completing the cycle +note: cycle used when checking assoc item `opaque::::opaque_ret` is compatible with trait definition + --> $DIR/unsupported.rs:33:24 | LL | reuse ToReuse::opaque_ret; | ^^^^^^^^^^ = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information -error: aborting due to 2 previous errors +error: delegation self type is not specified + --> $DIR/unsupported.rs:54:18 + | +LL | reuse Trait::foo; + | ^^^ + | + = help: consider explicitly specifying self type: `reuse ::function` + +error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0391`. diff --git a/tests/ui/delegation/unsupported.rs b/tests/ui/delegation/unsupported.rs index 678c93dcd53c0..3349c4ec27ab1 100644 --- a/tests/ui/delegation/unsupported.rs +++ b/tests/ui/delegation/unsupported.rs @@ -1,3 +1,4 @@ +//@ compile-flags: -Z deduplicate-diagnostics=yes //@ revisions: current next //@ ignore-compare-mode-next-solver (explicit revisions) //@[next] compile-flags: -Znext-solver @@ -51,6 +52,7 @@ mod effects { } reuse Trait::foo; + //~^ ERROR: delegation self type is not specified } fn main() {}